Prius (Gen 2) :: Pumping Sound Under Driver Side Dash?


Oct 31, 2013

For many months now, I've heard what sounds like some kind of pumping noise. This happens after starting the car and may go from brief to a few minutes. Seems to happen after every cold start and often even when warmed up. Some starts are soundless. I only recently discovered that it's coming from under the hood beneath the relay/fuse box. I can't see where it seems to be coming from.

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Prius (2004-09) :: Clicking Sound Under Dash On Driver Side

I am the original owner of a 2008 Prius, and am familiar with the various noises that the car likes to make. However, a new clicking noise has started recently, and need to identify the source/cause, so I can (hopefully) repair it myself, or have it repaired cost effectively.

I have attached a pic of what I think is the source of the noise.

This pic is looking upwards under the dash, above the brake pedal. In the center of the pic is a white thingamajig. This thing is attached to a motor on the right side (to the right of what I think is a yellow bearing or washer), and the other end is attached to a darker gray arm. When the climate control makes an adjustment, the motor turns, the white plastic piece turns, and the arm moves. What appears to happen is that sometimes, the motor continues to operate when it shouldn't, and these plastic pieces all kind of move around, clicking.

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My son just changed my oil, radiator fluid & transmission fluid on my 2007 Prius with 125,000 miles. Now it makes a fairly quiet, intermittent pumping or quiet growling/humming noise. A vibration can be felt near the driver's left foot when the noise is heard. The noise starts about a minute or two after starting the car & goes on & off, about every 30 seconds, for the entire time the car is running or driving. The car seems to drive normally, although I've only driven it a few miles, a few times. The only unusual dash light is the "maintenance required" indicator which has been on since before the fluid changes.

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I just noticed this happening on my wifes car the other day. It almost sounds like the windshield wipers are on high. Here is a link to the video where you can distinctly hear it. Also is that the inverter whining over there in the background? That's normal right?

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The A/C for the rear passengers has always been very weak. Do others find this to be true also? I keep thinking that extending the air outlets under the seats somehow might work.

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Prius owner. I have 200,000 miles on the car and have done nothing except change the oil, tired and battery. No other maintenance was performed.

While driving straight the front wheel seems to vibrate some and make a whirring/roaring sounds. When turning to the left the noise is greatly reduced. When turning to the right it still exists.

Any potential causes? Possibly the struts? They as well as all the front end components are original.

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got in the car this morning, it revved a little high and now sounds like an air pump is constantly going. You don't hear it as much when you drive but when stopped and especially when you open the hood, its like a compressor is going. It seems to be coming from the back end of the air intake tubing...on the passenger side, not near the intake itself.

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I recently purchased a certified pre owned 11 350 AWD and am noticing a dash rattle on the drivers side. It seems to be on the dash above the tachometer. If I apply pressure(w my hand) it seems to go away.

I know rattles come in all shapes and sizes but where would you start?

Here's a night pic: Only had it a few weeks.

This is what I have done so far.
20/10 Tint
6K Low Beam Headlights
LED Parking Lights

Quick question: By replacing the HID low beam bulb do I lose the headlight turning adjustment feature. It doesn't appear to work now.

Thinking about Plastidipping the AWD GS350 emblem

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What is it? Can it be shut off?

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